RFR: 1902: Log response code when response body cannot be parsed

[Erik Joelsson]

This patch adds better logging of response status codes when things fail.

-------------

Commit messages:
 - SKARA-1902

Changes: https://git.openjdk.org/skara/pull/1514/files
 Webrev: https://webrevs.openjdk.org/?repo=skara&pr=1514&range=00
  Issue: https://bugs.openjdk.org/browse/SKARA-1902
  Stats: 15 lines in 3 files changed: 9 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/skara/pull/1514.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1514/head:pull/1514

PR: https://git.openjdk.org/skara/pull/1514